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      <title>CVE-2026-49430 — Kernel heap overflow in ZFS_IOC_RECV_NEW ioctl</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-49430</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; FreeBSD&lt;/p&gt;
&lt;p&gt;The ZFS_IOC_RECV_NEW ioctl, in the heal receive path, similarly truncated a 64-bit payload size to a 32-bit integer for allocation, then used the original 64-bit size as the length for a byteswap operation.&lt;/p&gt;
&lt;p&gt;A local user with the &amp;#34;receive&amp;#34; delegated ZFS permission can trigger kernel memory corruption via ZFS_IOC_RECV_NEW by sending a crafted receive stream in heal mode.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; FreeBSD&lt;/p&gt;
&lt;p&gt;The ZFS_IOC_RECV_NEW ioctl, in the heal receive path, similarly truncated a 64-bit payload size to a 32-bit integer for allocation, then used the original 64-bit size as the length for a byteswap operation.&lt;/p&gt;
&lt;p&gt;A local user with the &amp;#34;receive&amp;#34; delegated ZFS permission can trigger kernel memory corruption via ZFS_IOC_RECV_NEW by sending a crafted receive stream in heal mode.&lt;/p&gt;</content:encoded>
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